Up until a couple months ago I mainly used my PC for gaming. Since I started mining, it's hard to let it stop earning me money.

What is the best way to let the system mine WHILE I game? I have 4 270s running on my windows 8 system and only need 1 of them to play Battlefield. Rather than completely shut down CGwatcher (what I use to run Kalroth's cgminer), is it possible to let me use 1 for gaming while the other 3 keep on hashing?
Yes, just use cgminer and disable the main one..